Position detection device and display device

A position detecting device for detecting a position of a pen by using electromagnetic induction action, the position detecting device comprising:

• a first electrode layer includes a first electrode configured to generate an alternating magnetic field;
• and
• a second electrode layer includes a plurality of second electrodes configured to detect a pen alternating magnetic field generated by the pen that has stored energy through the alternating magnetic field,
• the second electrode layer being formed on a surface on a side of a substrate.

A display device for use in a position detecting device for detecting a position of a pen by using electromagnetic induction action, the display device comprising:

• a display front panel;
• a thin film transistor back panel provided to a lower surface of the display front panel, the thin film transistor back panel being coupled with thin film transistors configured to drive display pixel electrodes of a display;
• and
• a touch panel provided on an upper portion of the display front panel,
• at least either a first electrode layer or a second electrode layer being provided in the thin film transistor back panel or the touch panel, the first electrode layer including a first electrode configured to generate an alternating magnetic field, and the second electrode layer including a plurality of second electrodes configured to detect a pen alternating magnetic field generated by the pen that has stored energy through the alternating magnetic field.